A company wants to start using Azure. They want to deploy several resources to their Azure subscription. They want to be informed of the costs of Azure resources that go beyond a certain threshold. Which of the following can help achieve this?

Answer options:

A.Create an alert in Azure Monitor.
B.Create a budget in Azure Cost Management.
C.Create an alert in Azure Advisor.
D.Create a cost tag for the resource group.

Answer – B 
You can create a budget and get a notification if the costs are going beyond the budget. 
The Microsoft documentation mentions the following. 

Since this is clearly mentioned in the Microsoft documentation, all other options are incorrect. 
For more information on Azure budgets, please visit the below URL- 

https://docs.microsoft.com/en-us/azure/cost-management/tutorial-acm-create-budgets